Sine and Cosine Functions

Sine and cosine are functions that are used to find angles and sides of triangles. On a graph cos=x and sin=y. To use sin and cosine you use the acronym SOH CAH: soh means sin equals the Opposite side from the angle over the hypotenuse of the triangle. CAH means cosine equals the adjacent side of the triangle over the hypotenuse of the triangle.  Secant and cosecant are two more functions that relate to cosine and sine.  Secant equals 1/cos and cosecant equals 1/sin. Basically they are the reciprocal of cosine and sine. Here is a picture showing how to use sine and cosine in a triangle.